Anchorage device



' Dec. 9, 1930* H. ROSENBERG ANCHORAGE DEVICE Filed Dec. 16, 1925 F/ZZ 4 I v haw.-

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Patented Dec. 9," 1930 UNITED STATES HEYMAN ROSENBERG, OF NEW YORK, N.-

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- Application filed December 16, 1925. serial li'o. 75,831.

This invention relates to improvements in the art of anchorage and in, anchorage de- .Vices, and has for its-primary object the qulck, easy and elfective anchorage of parts 6 of work together or to a single part of work. A further object in view is the elfecting of a permanent anchorage especially well adapted for resisting separating or loosening stresses. With these and further objects in view as will in part hereinafter become apparent and in part be stated, the inventioncomprises certain novel steps in the art of anchorage .and certain novel constructions, combinations and arrangement of partsas subsequently specified and claimed.

In the accompanying drawings,- Figure 1 is a view partly in central section and partly in elevation of a structure embodying the features. of the structural V parts of the present invention and especially well adapted for carrying outthe art Figure 2 is a vertical, central section through the parts seen in Figure 1 in their 3 final, anchored position.

Figure 3 is a vertical, central section through the sleeve rivet detached.

Figure 4 is an inverted plan of the parts seen in Figure 1 with the wedging member Figure 5 is a detail, taken on the plane indicatedby line 5 5 of Figure 1.

Referring to the drawings by numerals, 1- and 2 indicate plates or sheets comprising the work to be operated upon, and said plates may, for purposes of -illustration, be considered respectively the metallic wall of-an automobile body and oneplate of a hinge of an automobile door. The anchorage device hereindisclosed is especially, well adapted for connec ion of such work in view "of the capacity o the anchorage device to resist torsional stresses as well as lateral stresses. It should be' obvious that the anchorage device may be applied to a single plate when desired, as, for instance, when forming the anchor for a butt-on, snap fastener, or the like. i he work whether of one-or twoplates or more is prepared for the reception of the against the inner face of the walls constitutfragmentary section pitched, threadlike ribs 12. The ribs or threads 12 are of hardened material, that is,

out injury to the threads. The pilot 10 is anchorage device by being appropriately apertured, as, for instance, being formed with an opening 3 through which is introduced a sleeve rivet 4 of special construction. The inner or inaccessible face of the work is pref- 'erably formed with a recess or recesses 5 ofl'- 7 set from the aperture 3 for receiving flowed material from the rivet 4 for locking the rivet against rotary movement incident to torsional stresses. "The rivet 4 is provided at its outer or exposedend with an outstanding. flange 6, and the bodyof therivet is of suiiicient length to extend throughand beyond the inner face of the work and is folded back within itself to form a return fold 7 lying snugly ing the main body of the rivet 4. The fold. 7 preferably-terminates approximately midway of the length of the main body of the rivet 4, but may be made longer or shorter according'to the character of the work and the. results desired. i

After the positioning of the rivet 4 through the work, a wedge is driven through the rivet. for expanding and otherwise acting upon the material of the rivet for 'efiectin an internalhead or riveted portion at the mner or said wedge pin prefer-ab y consists'of a substantially cylindrical body 8 having a head 9,

'a pilot 10, and a tapering end or point 11, the

body 8 being provided with outstanding highare sufiiciently hardened to enter or cut ordinary soft steel or soft iron substantially withpreferably of slightly larger. diameterthan the diameter of the body 8, and each rib or thread 12 outstands from the body 8 a distance' sufliciently great for outstanding'beyondthe extended lines of the cylinder represented .by the pilot 10. Thus each rib 12 has .a ortion merging into the shoulder formed y the upper end of the pilot 10 and a portion outstanding radially beyond the said pilot, all as set forth in my above-mentionedpatent. The main bore of the sleeve rivet 4 is of substantially the same diameter as the pilot 10, and the bore of the return fold 7 is as much smaller as the difference represented by the thickness of the material making up the return fold 7. The rivet 4 is preferably formed of soft sheet steel or like appropriate material, but may be made of any other acceptable substance capable of functioning as hereinafter stated.

\Vhen the parts are in the position seen in Figure 1, they areconditioned for the carrying out of the art or process comprising a part of the present invention, and as a clear and full understanding of such process'may perhaps best be gained from a statement of the operation of said parts in being assembled, such operation will be now described. The rivet 4 having been located in the work, the wedge pin is positioned with its tapering end 11 within the rivet and may be thrust manually inward until the pilot 10- is seated within the main body of the rivet 4 with the outstanding portions of the ends of the thread-like ribs 12 resting against the material at the outer terminus of the sleeve rivet 4.- The operator then strikes the head 9 a blow preferably with an appropriate instru ment, such as a hammer, the blow being delivered in a direction axially of the wedge pin. The pin is thus caused to advance longitudinally within the rivet 4, and two distinct actions occur. The threads or ribs 12 begin to enter the material of the rivet 4 and to cause a slight rotation of the wedge pin, that is, a rotation equal to the angle represented by the pitch of the ribs 12. At the same time, the inclined walls of the tapering tip or point 11 contact with the material at the free or exposed end of the return fold 7 and act as a wedge to spread the engaged parts radially in all directions. The rotary movement of the wedge'pin as it advances assists in effecting a flow of the metal engaged by the inclined walls of the tapering end portion 11. As the rivet 4 cannot advance with the advance of the wedge pin, the portions of the walls of the rivet beyond the work and also of the return fold beyond the walls of 2, the parts assume the positionshown there-' in. As thus positioned, material of the rivet 4 and especially of the return fold 7 has been caused to flow or otherwise move to a position in advance of the shoulder between the pilot 10 and the body 8 of said pin. The in is, therefore, firmly and permanently ocked against retrograde movement. The material of the rivet will have also been caused to flow into the valleys between the ribs 12 and to have become compact therein and so intimately contacting with the body 8 as to effectively resist withdrawal of the wedge pin even if the shoulder of the pilot 10 were not functioning to effect such resistance. It is intended that ,the rivet 4 and the wedge pin shall be proportioned to always. produce the result just stated as shown in Figure 2, but from many causes it may be possible that the wedge pin may at times be long enough to have the shoulder at the outer end of pilot 10 move inward beyond the material of the rivet 4. In that case the wedging pin is effectively held against retrograde movement by the impinging of the surrounding material of the rivet 4, and in any case the buckling and expansion of the parts of the rivet 4 will have produced an annular flange or riveted portion at the inner end of the body of sleeve rivet 4 and shrinking the body to accommodate such fold, so that the inner end portion of the bore of the rivet will be smaller than the outer portion of the bore and an annular shoulder of material of the rivet will inset to take the place of the inner end of return fold 7 and to receive the action of wedge tip 11 and ribs 12. Or, as another acceptable equivalent of the fold 7, the wall of the rivet 4 may merely be thickened throughout that portion corresponding to the length of return fold 7, but, in this last case,

the material would not buckle freely, as in Figure 2, and flowing of-the metal by way of bulging expansion would morelargely occur. The adaptability of the invention for use on structures having inaccessible interiors should be obvious from the foregoing. Sheets of metal arranged to afford no access to their inner surfaces can be connected effectively and easily, all of the work of'effecting the anchorage being performed at or outside of the outer or exposed surface. This application is one ofa series of three filed by me on the same date and copending, one of the other two being for art of anchorage, Serial No. 75,830, and the other for anchorage devices, Serial No. 75,832.

tended lines of the surface of the end portion for causing the rib, to enter the material of the rivet when the pin is forced into the rivet longitudinally, the rib suiiiciently approximating parallelism with'the longitudinal axis of the pin for permitting the pin to be so driven into the rivet and for causing the rib to enter the rivet approximately longitudinally-with respect to itself when the pm is so driven.

a 2. Anchorage means comprising a sleeve rivet and a pin having a body adapted to be accommodated within the bore of the rivet, the pin having a rib outstanding from the body beyond the lines of the bore of the rivet and locatedsufficiently approximating parallelism with the longitudinal axis of the pin for permitting the pin to be driven into the rivet while allowing the rib to enter the material of the rivet approximately longitudinally of the rib.

3. Anchorage means comprising a sleeve rivet having a return fold, and a pin adapted to be driven into the rivet, the pin having a reduced smooth portionadapted to engage andbuckle the return fold, and the pin also having means adapted to enter material of therivetand eflect anchorage of the pin to the'rivet.

4. In anchorage means, the combination of a sleeve rivet adapted to extend into work, and a wedge pin adapted to extend into the sleeve rivet, the wedge-pin having a, rib sufficiently approximating parallelism with the longitudinal axis of the pin for enabling the rib to enter material of the'rivet during sub stantially longitudinal advance of the pin the bore and constricting the bore for the length of the return fold, and a pin proportioned to be inserted longitudinally into the sleeve and to be accommodated by the larger portion of the bore and of a diameter exceeding the diameter of the bore of the return fold, said pin being provided with a wedging cone located and proportioned to expand said return fold to a maximum limit incident to the forcing'of the pin inward along said sleeve, and the pin being ribbed in position for entering the material of the return fold subsequent to the expansion thereof by the wedging cone.

8. The combination of a sleeve having a bore and a return fold of the sleeve within said bore terminating short of the length of the bore and constricting the bore for the length of the return fold, and a pin proportioned to be inserted longitudinally into the.

sleeve and to be accommodated by the larger portion of the bore and of a diameter'exceeding the diameter of the bore of the return fold, said pin being-provided with awedging cone located and proportioned to expand said return fold to a maximum limit incident to the forcing of the, pin inward along said sleeve, and the pin being ribbed in position for entering the material of the return fold subsequent to the expansion thereof by the wedging cone, the ribbing of the vpin being sufficiently numerous and hardened and having s ch relation to the longitudinal axis of the .pin for enabling the pin to be forced by direct axial stress to a position within the'return' fold and for causing theflow of material of the return fold in the spaces between the ribs incident to such advance into,

the sleeve. I

In testimony whereof I aflix my signature.

HEYMAN ROSENBERG.

under a hammer blow, and the rib being I adapted to retain parts of the rivet flowed incident to the entry of the pin in the posi tion assumed during such flow.

5. In anchorage means, the combination of a sleeve rivet extending into work, a wedge pin within the rivet having a rib, of suflicient- 1y high pitch to approximate parallelism with the longitudinal axis of the pin, said rib extending into the material of the rivet.

6. The combination of a sleeve rivet and an anchorage member havinga rib suflicientlv nearly paralleling the longitudinal axis of the me'mber'to enable longitudinal, axialstresses to force the member into the sleeve and .to cause the rib to enter-material of the rivet for effecting anchorage of the rivet in I work in which the rivet is located.

7. The combination of a sleevehaving a bore and a return fold of the sleeve within said bore terminating short of the length of- 

